Margin stop for typewriters



April 30, 1929. M. GARBELL "1,711,313

mm STOP FOR TYPEWRITERS Filed May 16, 1927 2 sheotsshet 1 W; TNESi INVEN TOR.

A TTORNEYJ'.

April 30, 1929. I M. GARBELL 1,711,313

KARGIN STOP FOR 'IYPEWRITERS Filed May 16, 1927 2 Sheets-Sheet 2 Uh IIII. I

4 Patented Apr. 30, 1929.

UNITED STATES 1,711,313 PATENT OFFICE.

MAX GARBELL, OF CHICAGO, ILLINOIS, ASSIGNOR '10 VICTOR ADDING MACHINEColl IEANY, OF CHICAGO, ILLINOIS,

A CORPORATION on ILLINOIS.

MIARGIN STOP FOR TYPEW'RITERS.

Application filed May 16,

pivotally mounted tooth or pawl which may yield, when moved in onedirection and engaged by an obstruction, but which is unyielding whenengaged by an obstruction and moving in the other direction. Moreover,the rack-bar on which the stop is mounted is positioned to be swung awayfrom the engaging obstruction wherebythe margin is released and themember on which the stop and bar are mounted may be moved additionalspaces.

My invention contemplates the provision of a margin stop device which issimple in character, compactly made of minimum sized stampings andpositive in looking action, all of which will. be better understood inconnection with the accompanying drawings, in which drawings:

Figure 1 is a rear elevational view of afragmentary portion of atypewriter machine margin stop rack-bar having a margin stop mountedthereon;

Figure 2 is an elevational cross-section taken on line 2-2 of Fig. 1;

Fig. 2 is an end elevational view taken on the line 2 a of Fig. 1;

Fig. 3 is an elevational view of a modified form of stop device;

Fig. 4 is a top plan view of the device shown in Fig. 3; and

Fig. 5 is an elevational sectional view taken on the line 55 of Fig. 3.

Referring now more particularly to the drawings, a margin stop rack-bar10 is provided with teeth 11 on its lower edge and has indicia at 12positioned thereon. The margin stop device 12 comprises an integralstamping folded over on itself, as best shown in Fig. 2, so that when itis in operative relation it surrounds the rack-bar 10. A leaf spring 13is positioned between the inner top edge of the stop member and theupper edge of the rack 10 thereby holding a tooth 14 in engagement withthe rack 11 on the bar 10. This tooth 14 also forms a retaining memberbeing bent out at ri ht angles from the side of the stamping as s own inFig. 2

A knurled portion 15 is integrally formed on the stop member so thatpressure thereupon compresses the spring 13 and permits 1927. Serial No.191,576.

the stop member to be rocked downwardly around its rigid portion todisengage the tooth 14 whereupon the stop member may be moved along therack-bar to some other predetermined position. The stamping when made isprovided with a window 16 in which is positioned a pointer 17 adapted tocooperate with the indicia 1O on the rack bar.

I have found the above described margin stop very simple to make becauseof the novel manner in which it may be stamped out from a single pieceof material and thereafter bent or folded and secured in the mannershown. Two downwardly extending lugs 18-18 are stamped out when thepiece is formed and, as shown in Figs. 1 and 2, these lugs extend belowthe plane of the bottom edge of the bar 10 and serve as points ofpivotal support for a finger 19. The latter is so shaped and mountedthat it is yielding in one direction against a spring 20, but isunyielding in the other direction by reason of the manner in which theportion 21 thereof abuts against the inturned portion of the tooth 14.

The spring 20 is secured in position between portions 22, turnedinwardly from the sides of the margin device, and another portion 23which is turned over end-wise from the stamp ing. It will be understoodthat all of the portions to which I have referred except the finger 19are integrally formed in one stamping, and that this simplicity offormation is one of the marked advantages of my invention.

As indicated, the finger 19 may yield when it is moved to the right andmeets an obstruction, but is unyielding when moved to the left and meetsa similar obstruction.

As intimated, the stop device is bent into form for placement on the bar10 and, as best shown in Figs. 2 and 2 portions or lugs are turned infrom the two sides to secure the member along the bottom of the bar 10.The portions which are turned in at the righthand of the margin stopform a double purpose in that they comprise not only a retaining portionbut also the tooth portion 14.

In Figs. 3 to 5 inclusive I have illustrated a further embodiment of myinvention wherein the rack 11 is positioned on the top of the machinestop-bar 10, the stop device 12 is here formed in somewhat similarmanner but is provided with a different form of releasing mechanism topermit its-movement along the stop-bar. As shown here, the stop devicecomprises a portion 25 folded over as at 26 to straddle the bottom ofthe bar and having a folded-over portion 27 to straddle the top of thebar. Moreover, the portion 25 is provided with upwardly extendingportions 2828 in which is mounted a portion 29 carrying the tooth 30.This portion 29 is spring pressed by the spring 31 mounted on thepivotmember 32 so that the tooth normally engages the rack 11. Extendingoutwardly from the member 25 is a finger-engageable portion 33, andintegral with and extending in the same direction from the member 29 isa similar finger-engageable por tion 3 By grasping these two portionsand pressing them together the action of spring 31 is overcome and thetooth 30 is lifted out of the rack 11 whereafter movement of the marginstop along the bar 10 is permitted.

A lug 35 is projected outwardly from the. bottomportion of the side 25and a spring 36 is secured thereto. A finger 37 is pivotally mounted in38 on don-'nwardly projecting portions 39 to be yieldable in onedirection but unyieldable in another.

While I have described but two en'ibodiments of my invention and haveexplained certain advantages which may be utilized in connectiontherewith, it is obvious that many modifications may occur to thoseskilled in the art which do not involve a departure from the spirit ofthe present invention, and moreover, that many advantages are inherentin the device, and that all these latter may not have been explained,and therefore, I desire that my invention be limited only by the scopeof the appended claim and the showing of the prior art.

I claim:

A. margin stop for a typewriter adapted to be moved along a margin stopbar comprising a rack edge, said stop comprising a stamping bent over tostraddle said bar, and a spring pressed finger pivotally mounted belowsaid bar between the two sides of said stop, and a rack engaging portionturned out from said stamping.

In witness whereof, I have hereunto subscribed my name.

MAX GARBELL.

